missing sort order on iPad makes frustrating user experience: five minutes of scrolling each time

I use the iPad for reading new research references when traveling. Some of my groups contain more than 5000 references. Now, when I set the sort order as “year” for reading the new stuff published, then the old refs of e.g. 1947 are on top and for getting to the ones of 2014 I have to swipe down  a few hundred times. Moreover, when I switch groups and come back to the previous group, I have to do it again. 
It makes the reading a kind of waste of time and frustrating, and I could not find any place in the settings or elsewhere to change the direction of the sorting from newest to oldest instead of oldest to newest. Certainly the feature must be there somewhere because a developer must have thought of that?